public class ByteArrayFIFOQueue extends AbstractBytePriorityQueue implements Serializable
Instances of this class represent a FIFO queue using a backing array in a circular way. The array is enlarged and shrunk as needed. You can use the trim() method to reduce its memory
usage, if necessary.
This class provides additional methods that implement a deque (double-ended queue).
| Modifier and Type | Field and Description |
|---|---|
static int |
INITIAL_CAPACITY
The standard initial capacity of a queue.
|
| Constructor and Description |
|---|
ByteArrayFIFOQueue()
Creates a new empty queue with standard initial capacity.
|
ByteArrayFIFOQueue(int capacity)
Creates a new empty queue with given capacity.
|
| Modifier and Type | Method and Description |
|---|---|
void |
clear()
Removes all elements from this queue.
|
ByteComparator |
comparator()
Returns
null (FIFO queues have no comparator). |
byte |
dequeueByte()
Dequeues the first element from the queue.
|
byte |
dequeueLastByte()
Dequeues the last element from the queue.
|
void |
enqueue(byte x)
Enqueues a new element.
|
void |
enqueueFirst(byte x)
Enqueues a new element as the first element (in dequeuing order) of the queue.
|
byte |
firstByte()
Returns the first element of the queue.
|
byte |
lastByte()
Returns the last element of the queue.
|
int |
size()
Returns the number of elements in this queue.
|
void |
trim()
Trims the queue to the smallest possible size.
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dequeue, enqueue, first, lastchanged, isEmptyequals, getClass, hashCode, notify, notifyAll, toString, wait, wait, waitchanged, isEmptypublic static final int INITIAL_CAPACITY
public ByteArrayFIFOQueue(int capacity)
capacity - the initial capacity of this queue.public ByteArrayFIFOQueue()
public ByteComparator comparator()
null (FIFO queues have no comparator).comparator in interface BytePriorityQueuecomparator in interface PriorityQueue<Byte>null.PriorityQueue.comparator()public byte dequeueByte()
BytePriorityQueuedequeueByte in interface BytePriorityQueuepublic byte dequeueLastByte()
NoSuchElementException - if the queue is empty.public void enqueue(byte x)
BytePriorityQueueenqueue in interface BytePriorityQueuex - the element to enqueue.public void enqueueFirst(byte x)
public byte firstByte()
firstByte in interface BytePriorityQueuepublic byte lastByte()
lastByte in interface BytePriorityQueuelastByte in class AbstractBytePriorityQueuepublic void clear()
PriorityQueueclear in interface PriorityQueue<Byte>public void trim()
public int size()
PriorityQueuesize in interface PriorityQueue<Byte>